Siemens SIMATIC S7 System Manual page 143

Examples of S_CONV value to string conversion
Data type
UInt
UInt
UDInt
Real
Real
Real
Examples of STRG_VAL conversion
IN string
"123"
"-00456"
"123.45"
"+2345"
"00123AB"
"123"
"-00456"
"+00456"
"123.45"
"123.45"
"123,45"
"123,45"
".00123AB"
"1.23e-4"
"1.23E-4"
"1.23E-4"
"12,345.67"
"12,345.67"
"3.4e39"
"-3.4e39"
"1.1754943e-38"
(and smaller)
"12345"
"A123"
""
"++123"
"+-123"
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
IN value
123
0
12345678
-INF
+INF
NaN
FORMAT OUT data type
(W#16#....)
0000 Int/DInt
0000 Int/DInt
0000 Int/DInt
0000 Int/DInt
0000 Int/DInt
0000 Real
0001 Real
0001 Real
0000 Real
0001 Real
0000 Real
0001 Real
0001 Real
0000 Real
0000 Real
0002 Real
0000 Real
0001 Real
0002 Real
0002 Real
0002 Real
N/A SInt
N/A N/A
N/A N/A
N/A N/A
N/A N/A
Programming instructions
6.2 Extended instructions
OUT string
"123"
"0"
"12345678"
"INF"
"INF"
"NaN"
OUT value
123
-456
123
2345
123
123.0
-456.0
456.0
123.45
12345.0
12345.0
123.45
123.0
1.23
1.23
1.23E-4
12345.67
12.345
+INF
-INF
0.0
0
0
0
0
0
ENO
TRUE
TRUE
TRUE
FALSE
FALSE
FALSE
ENO
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
FALSE
FALSE
FALSE
FALSE
FALSE
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